What method involves in-depth study of biographies obtained through interviews, questionnaires, and psychological tests?

I believe the answer is: case-study

Case study is a form of study that being done to know the development that experienced by a certain individual or a group over a period of time, Things such as interviews, questionnaires, and psychological tests would be as a data that included as the factors to count the rate of development.

portugal is the westernmost country in europe.

answer; (trauma);